In the US, yes you can buy a train. Where you store it would be up to you. Most private trains are either stored on private tracks owned by their owners, or they rent some storage on someone else's tracks. If you want to buy a new train, you would talk to the train manufacturers; or you can buy a used train.
The life expectancy of diesel-electric and electric locomotives is expected to be similar—about 25 years. Both types of motive power are subject to technological obsolescence.
Hydrogen-powered fuel cells, combined with batteries to store electricity, would be a zero-emissions solution to replace the diesel-electric locomotive, Moslener says.
Power plant capacity is far greater than any individual locomotive uses, so electric locomotives can have a higher power output than diesel locomotives and they can produce even higher short-term surge power for fast acceleration.
Anyway, the reason for using two locomotives is pretty simple. Twice the number of locomotives means twice the power. This extra power boost is used for especially heavy loads or for trains going up steep grades.
As wireless technologies advanced in the 1960s, freight railroads began adding extra locomotives to the rear of trains to give them enough power to climb steep hills. This is how distributed power was born.
In 2017, there were 100,472 locomotives in the world. This includes electric locomotives, diesel locomotives, steam locomotives, hydrogen locomotives, and any other kind of locomotives.
Maharajas' Express, IndiaThe Maharajas' Express holds the record for the most expensive train trips in the world. It costs $3,385 to spend a night in this traveling Presidential Suite. The Maharajas' Express is operated by the Indian Railway Catering and Tourism Corporation (IRCTC).